Improvement in artificial stone



I vvl UVIIII VUI I lv u comma 0R msnc To all whom it may concern:

Be it known that I, \VILLIAM HENRY LEW- IS, of Philadelphia, in the county of Philadelphia and in the State of Pennsylvania, have invented certain new and useful Improvements in Making Artificial Stone; and do hereby declare that the following is a full, clear, and exact description thereof.

' The nature of my invention consists in making artificial stone from the ingredients and by the process hereinafter described.

I use )hur, two pounds; alum one-quarter of a poun Portland cement, one barrel; sand two barre s; an wa er, our gallons. Ihrst dissolve the alum and sulphur in the water at a temperature of 2l2 i lfahrgi h ejt, then thoroughly mix the cement and sand, and add 991 .eielnnansis lnhsr- After all these'TIgredients have been thoroughly SUBSTITUTED FOR MISSING COPY.

PATENT OFFICE.

WILLIAM H. LEWIS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF PART INTEREST TO H. E.,THAYER, OF SAME PLACE.

IMPROVEMENT IN ARTIFICIAL STONE- Specification forming part of Letters Patent No. 139,167, dated May 20, 1873; application filed March 28, 11573.

The within-described process for making.

artificial stone of the ingredients mentioned.

In testimony that I claim the foregoing I have hereunto set my hand this 3d day of March, 1873.

WILLIAM HENRY LEWIS. Witnesses:

FRANK K. HIPPLE, EUGENE WILEY.

EXAMINER 

